Transfer mechanism



Sept. 21, 1954 o. P. DE LOE 'rmsma uscmmxsu 2 Sheets-Sheet 1 Filed Feb. 13, 1951 m m s E D M PY EB w a m P Sept. 21, 1954 o. P. DE LOE musma uscmuusu 2 Sheets-Sheet 2 Filed Feb. 13, 1951 V INVENTOR. UUVEE Rte/L D5 [0:

ATTORA/[YJ Patented Sept. 21, 1954 I UNITED STATES PATENT flIFlFTCfE MECHANISM Bliver Paul De Loe, Detroit, zMicin, assign'or to The .Natio ml Machinery Gompany, wiflin, Ohio; .a corporation of Ohio Application February 13, I951, *SefialNofZlMNS 6 Claims. (01. 10---12=) inuentionznelates to :macmnes for making Fig. '2 is a diagramma ticman view nf thetrans- .metaal articles such asi'nuts [and more particularly fer'mechanrsmshowing thepaths through to a transfer mechanism for such machines. the bl'anks travel. I

In "the manufacture of articles such as bolts, Fig. 31showsamciified io'rm of transfer mechnuts, -and the like, a bed Jfname is provided with arfi'sn'1enzibm'iyi-i-ig theqrre'sentinvention. ia serieslof dies aud "a reciprocating header slide Fig. 4 is an elevativn with parts in section "carrying tools in alignment with the dies coopshowing the mounting ferr a ipair o'f transfer erates with such dies to shape the article. The fingers. articles are advanced sequentially from .one Ydie Fig. 5 is a piam view o f the transfer mechato the (next adjacent-die by .a transfer mechanism, anti nism whichmovesin timedrelation .to .the'header wig. '6 is an elevation of the transfer imechaslide movement. A type of transfer enjoying wideucurrent use islthat disclosed 'in the patent Referring to Tithe draw-mes, the transfer mechto .Frayer 3N0. "2,101028 wherein a nut 'blank is anism is z'iilustratedrinithe environment Iii n'mut moved from one Hie station to the next by an forming machine mavin'gm flared "frame 51am! a arm pivoted m'iclwafbetween'thewstations. When reciprocating "siide 'fll'h'e iaed frame is the heafier slide is moved away from the bed provided "with diezstations i8, 9, M iandwlflyantl Irame dies, the arm is swung 1'80 degrees and theihearler sli'de'is moviried complementary the fingers on the arm carrying the nut blank 450615 111, 8a, 8w, 1| on, :and. "Ma. "OITFOd stock thus turn "the blank 180 degrees "between each ifeii intomhe machine is out into lengths ITPYO- station. riding the required vclumewof metal by shear L2 The inversion of "the blankfrom nn'e die s'tawhich moves the cut "blank up into :ali'gmnent "tion to thecnext "is desiratle in'the'manu'facture with theriie i1 zamdfismovedlinto die'fliby'header urmany typesof conveiitionainuts. Frequently, slide steel in. Thereafter blank is ejected however, it is necessary or *tiesirableto perform firom :die it into the first pair oi transfer fingers successive operations by the header slitietools I3-|4 and is sequentially worlcetl :in dles =18, on 'the same face 'dfthelnut blank; This need it!) and it. FIiheilast die in the :series iis'mreferwas recognized by the saiii patenteelirasrer-and $1315 a trim die nd the finished nut mane-is safiflm'atent discloses a straight "line reciprocatpushed itlrrough saididie =H vintoeichute-or-the 'ing transfer *wh'ichmayheuse'd where the blank iiite formedin the'bsdtrame. "is to be transferred withoufltuming same be- The transfer mechanism includes the actuator tween stations. 'shafits 1H2, t5, .i'l-rand.l=-B miuotallyzmounted with Thepresent invention is'directedtoa'transfer :respect to the r'beclttranm midway *between the m -i he blank is carries-bodily cties Flto (M respectively; Eaoh iactuatoreshait througha semi-circular pa'iihirom a first the z-hESEfiXBd thereto transieparmgifict tfia l-lwand -'station to a "second the station with the same Mia (and th arms are proportioned with respect hlank face disposetltowardMath-flies. Itisamons to the die .spaci-ngsso that thetaee end of the the Objects "of my invention *P fle a T arm is in alignment vertically with an adjacent Yer mechanism ii-hat will Ca y a "b k b y =elie station. The arms l=5a--.t8a are arranged "from a first flie station to a second die station to be oscillated in unison 1-80 .deg rees sotas to fi h a 's ular with and at the same swing .from a position tin vertical alignment with time I 'reser-ve "the axial dispos'itlfln of fie bl one die to -a position m alignment with the next with P' 't' Tt s object *asljacent zd-ie. For instance, ithearm IEa-i-is .in its or inventifin topmvifi fl w .leit ha-rid ,position shown in Fig. :1 whereiit is wherein the 151ml?) r jprQgfess'ively j in "vertical :alignm ent with die a. the through aserl'es of die'statmnsby way amn oscillated 1 89 degrees, at wilt be in its-ri -eircu1ar path 'between each die station an osition :afigmnent "with die ii. To oscillate wherein *the blanks are inverted between ear- GETS tain 'di'e stations and are not invented :in their ms a tack m mesh Wm g travel between certain other flie stations. Fur- 1 i fi F fi mk an s r -escala in ther "objects and advantages 'WiQI aDPHar from "l i 5 Q d a d the following-description andthe app'endednraw- ---3'1respectively, the rack H?" .15 oscillated an tunes amgs wherein, relation *to the header Shiite m'iovement :so that Fig 1 is pergp'efitiw jfwi'gw 3 1mm; frmmg upon each advance (if the header slide toward -mm;hme apmided with is. 'tmnsfier mech nism the bed \frame dies the anns lice-ma are m accoraing' to thezimsexit mventiun. i3th8i1 rightihandmositinns. heaelerrslide other jdie stations.

recedes from the bed frame dies the arms I a I 8a are moved to the position shown in Fig. 1. Fig. 2 illustrates diagrammatically the position of the arms lid-[8a at the mid point of their travel from the left hand to right hand positions.

The arms l5a, 16a and [8a are shown as provided with depending transfer fingers l3--l4, 24-25, 'and 28- -29 respectively. The fingers are spring pressed toward each other so that blanks ejected from the dies 1, 8 and II) will be resiliently held during the transfer to the next adjacent die. The said fingers l3l4, 2425, and 2829 are carried by block members I50, I60, and H30 fixed to arms 15a, l6a, and ISarespectively. Since the arms I 5a, [3a and l8a each turn 180 degrees in moving from their left hand position to their right hand positions, th blanks carried by the transfer fingers are likewise turned 180 degrees. gage one end of the blank in die 8 and the tool 9a will engage the other'end of the same blank in die 9. When, however, the nut forming process requires that tool Illa engage the same end of a blank in die ID that was worked by tool 9a in die 9, the blank should be transferred from die 9 to die l3 Without turning the blank.

To provide for the non-turning of the blank during transfer from die 9 to die 10, the free end of arm Fla is provided with a bearing clamp l'ld for the bearing He. The fingers 26 and 21 are carried by the member 110 which is rotatable in bearing He. The bearing He is adjustable vertically with respect to arm I'Ia by means of the threaded connection as shown and may be adjusted'angularly by means of the set screws IT) and Hg. Transversely of the lower end of member "c, a flat leaf spring I'Ih is secured as at I12. The free ends of the leaf spring l'lh are formed with reentrant portions which embrace the 'portions I60 and lBc of the adjacent transfers. The above described arrangement results in a parallel linkage control for the transfer fingers 26 and 21 which precludes their turning with respect to the die breast. Thus a blank carried by fingers 26 and 21 will not be inverted as it is moved from die 9 to die Hi.

It will be understood that any number of transfer units of the type such as He may be used depending on the requirements of the forming process employed I and the article being shaped. I have illustrated the transfer of the non-turning type in connection with the 3d and 4th die stations but it is well suited for use at Mechanism other than the leaf spring I'Ih may be employed to prevent the 'end-for-end turning of the blank during transfer. For instance the modification of Fig. 3 may be used.

In Fig. 3 adjacent die stations are indicated at 30 and 3|. The transfer arm 32 is oscillated between the two die stations by rack means such as described in connection with the preferred embodiment. The gear 34 is non-rotatably secured to the bed frame and with respect to the oscillating arm 32. The arm 32 carries with it an idler gear 35 in mesh with the fixed gear 34 and a gear 36 keyed to the transfer finger shaft 3?. The gears 34, 35 and 36 being of the same size and having the same number of teeth results in the transfer fingers remaining parallel to the die breast. The swinging of the arm from die 33 towards die 3| produces .a counter-clockwise rotation of the idler gear 35. The rotation of the idler gear in a counter-clockwise direction produces a clockwise rotation of the transfer finger For instance, the tool 8a will en-' able detail, numerous variations may be made therein without departing from the scope of the invention as defined in the following claims.

I claim:

1. A transfer for progressively moving a metal blank through a series of parallel coplanar die stations comprising a plurality of parallel spindles mounted for rotation around an axis in a plane normal to the plane containing the axes of the said die stations, a transfer arm fixed to each spindle at right angles with respect to the rotational axis of the spindle, means to simultaneously oscillate said spindles through degrees, a pair of cooperating transfer fingers mounted on each of said arms parallel to the axis of rotation of said spindle, at least one pair of said fingers being pivotally secured to its arm on an axis parallel to the oscillating axis of the spindle, at least another pair of said fingers being non-rotatably fixed to its arm, and means to turn said pivotally secured fingers with respect to its arm as the arm is oscillated by the spindle. 2. A transfer for moving blanks through aseries of parallel coplanar die stations comprising a series of parallel coplanar oscillatable actuators pivotally mounted between the die stations on axes normal to the plane containing the axes of the dies, means to oscillate the actuators, a transfer arm on each actuator proportioned with respect to the spacing of the die stations so that the free end of the arm swings from one die station to the next adjacent station as the actuator is oscillated, a pair of cooperating transfer fingers secured to said free end of each arm, at least one pair of said fingers being pivotally mounted on the arm on an axis parallel tothe actuator axis, at least another pair of said fingers being non-rotatably fixed to its arm, means secured to said pivotally mounted fingers engaged by an adjacent pair of. fingers whereby said pivotally mounted fingers are turned with respect to its arm as the actuators are oscillated.

3. A transfer comprising a plurality of parallel coplanar pivotally mounted actuators, means to oscillate the actuators in unison through 180 degrees, a transfer arm fixed to each actuator, a depending transfer member secured to each arm, at least one of said members being pivotally secured to its arm on an axis parallel to the axis of oscillation of the actuators, at least another of said members being non-rotatably fixed to its arm and means connecting said pivotally secured member to said non-rotatably fixed member whereby said pivotally secured member is turned on its pivotal axis with respect to its arm as the said arms are oscillated.

4. A transfer comprising a plurality of parallel coplaner pivotally mounted actuator means, operating means to operate said actuator means in unison around their pivots, each actuator means including a transfer arm having a portion spaced from its pivot, a transfer member secured to said portion of each transfer arm, at least one of said members being pivotally secured to its arm, at least another of said membersbeing non-rotatably fixed to its arm, and member operating means preventing said pivotally secured member from rotating with its arm when its arm is rotated by said operating means.

5. A transfer comprising a plurality of parallel coplaner pivotally mounted actuator means, operating means to operate said actuator means in unison around their pivots, each actuator means including a transfer arm having a portion spaced from its pivot, a transfer member secured to said portion of each transfer arm, at least one of said members being pivotally secured to its arm, at least another of said members being non-rotatably fixed to its arm, and an operating arm mounted on said pivotally secured member engaging an adjacent member preventing said pivotally secured member from rotating with its arm when its arm is rotated by said operating means.

6. A transfer comprising a plurality of parallel coplaner pivotally mounted actuator means,

operating means to operate said actuator means in unison around their pivots, each actuator means including a transfer arm having a portion spaced from its pivot, a transfer member secured to said portion of each transfer arm, at least one of said members being pivotally secured to its arm, at least another of said members being non-rotatably fixed to its arm, and member operating gears preventing said pivotal- 1y secured member from rotating with its arm when its arm is rotated by said operating means.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 398,664 Sleeper Feb. 26, 1889 1,982,460 Wilcox Nov. 27, 1934 2,100,028 Frayer Nov. 23, 1937 2,128,186 Jones Aug. 23, 1938 

